光阴似箭 时间是很宝贵的,谁都浪费不起时间。时间一旦消逝，就永 不再回来。你永远也无法让时光倒流。时间过得很快，事实 上，人们说光阴似箭。岁月不待人，因此，我们应该好好善用时 间。

Lesson 117
Time Flies
Time is precious. Nobody can afford to
waste time. Once time has gone by, it will
never return. You can never turn the clock
back. Time passes very quickly. In fact,
people say time flies. Time and tide wait for
no man. We should, therefore, make the
best use of our time.